A PCBA board solder paste printing equipment

Abstract

The present invention discloses a PCBA board solder paste printing device, which relates to the technical field of PCBA board processing, including a jig plate and a clamping member. The jig plate is provided with a first positioning portion for positioning the PCBA board and a second positioning portion located at the outer periphery of the PCBA board. The second positioning portion extends in a first direction perpendicular to the PCBA board. The outer periphery of a steel sheet abuts against the second positioning portion and is movably arranged in the first direction relative to the second positioning portion. The second positioning portion can limit the steel sheet and provide a guide for the steel sheet to move along the first direction; the clamping member is movably arranged along the first direction, the clamping member clamps the outer edge of the steel sheet and keeps the steel sheet parallel to the PCBA board. The steel sheet and the clamping member are relatively fixed in the first direction, and the clamping member drives the steel sheet to fit with the PCBA board at a preset position, thereby solving the technical problem that the steel sheet and the PCBA board are easily misaligned during the alignment or separation process of the steel sheet and the PCBA board, thereby enabling the steel sheet and the PCBA board to be quickly and accurately positioned.

Description

Technical Field

[0001] The present invention relates to the technical field of PCBA board processing, and in particular to a PCBA board solder paste printing device. Background Art

[0002] During the solder paste printing process on the PCBA board, the solder paste steel sheet needs to be precisely aligned with the PCBA board. Then, the steel sheet and the PCBA board are clamped together by a fixture or fixed together with tape. Finally, the solder paste is brushed on the steel sheet and passed through the clearance holes on the steel sheet so that the solder paste remains at the position on the PCBA board where soldering is required.

[0003] However, during the alignment or separation process between the steel sheet and the PCBA board, the steel sheet and the PCBA board are prone to misalignment, resulting in incorrect solder paste printing position or solder paste being scratched, affecting the subsequent soldering effect.

[0004] Therefore, how to avoid misalignment between the steel sheet and the PCBA board during the alignment and separation process is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a PCBA board solder paste printing device, which can realize fast and accurate positioning of the steel sheet and the PCBA board, avoid displacement between the steel sheet and the PCBA board, and improve the printing effect of the solder paste.

[0006] To achieve the above object, the present invention provides a PCBA board solder paste printing device, comprising:

[0007] A jig plate, wherein the jig plate is provided with a first positioning portion for positioning the PCBA board, and a second positioning portion located at the periphery of the PCBA board, the second positioning portion extending in a first direction perpendicular to the PCBA board;

[0008] The clamping member is movably arranged along the first direction, the clamping member is clamped on the outer edge of the steel sheet and keeps the steel sheet parallel to the PCBA board. The steel sheet and the clamping member are relatively fixed in the first direction, the outer periphery of the steel sheet abuts against the second positioning portion, and is movably arranged in the first direction relative to the second positioning portion. The steel sheet is fitted with the PCBA board at a preset position.

[0009] The beneficial effect of the present invention is that the PCBA board is positioned on the jig plate by the first positioning part to ensure the position accuracy of the PCBA board, and a second positioning part extending in a direction perpendicular to the PCBA board is provided on the outer periphery of the PCBA board. The steel sheet is positioned by the circumferential abutment of the outer periphery of the steel sheet with the second positioning part. After both the steel sheet and the PCBA board are positioned, the position where the solder paste is required to be printed on the PCBA board is aligned with the holes in the steel sheet; the clamping part can keep the steel sheet parallel to the PCBA board and drive the steel sheet close to or away from the PCBA board. Under the limiting action of the second positioning part, the steel sheet moves in a direction perpendicular to the PCBA board and fits with the PCBA board at a preset position, so that the steel sheet can only undergo relative displacement in the direction perpendicular to the PCBA board during the alignment and separation process with the PCBA board, and will not be misaligned in the board surface direction of the PCBA board, thereby improving the printing effect of the solder paste. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0011] Figure 1 A schematic diagram of the three-dimensional structure of the PCBA solder paste printing equipment provided in an embodiment of the present invention;

[0012] Figure 2 A schematic diagram of the structure of the PCBA board and the steel sheet in the state of being separated provided by an embodiment of the present invention;

[0013] Figure 3 Schematic diagram of the relative positions of the steel sheet, PCBA board, positioning plate, and fixture plate provided in an embodiment of the present invention;

[0014] Figure 4 A schematic diagram of the baffle structure provided by an embodiment of the present invention;

[0015] Figure 5 A schematic diagram of the linkage structure between the positioning plate and the baffle provided in an embodiment of the present invention;

[0016] Figure 6 A schematic diagram of the linkage structure between the positioning plate and the push rod provided in an embodiment of the present invention;

[0017] Figure 7 This is a schematic diagram of the cooperation structure between the third drive plate and the guide groove provided in an embodiment of the present invention.

[0018] In the figure: 1- fixture plate; 2- steel sheet; 3- clamping piece; 4- PCBA board; 5- bottom plate; 6- collection plate; 7- positioning plate;

[0019] 11-second positioning portion; 12-positioning groove; 13-avoidance portion; 111-second positioning frame; 131-first avoidance groove; 132-second avoidance groove;

[0020] 31-chuck; 32-connecting plate; 33-second driving member; 34-support plate; 35-fixing block; 36-guide rod; 37-second spring; 311-clamping groove;

[0021] 61- inclined portion; 62- horizontal portion;

[0022] 71 - first positioning frame; 72 - baffle; 73 - notch; 74 - first driving member; 75 - mounting plate; 76 - first spring; 77 - second driving plate; 721 - positioning section; 722 - connecting section; 723 - first driving plate;

[0023] 81-first vertical plate; 82-first rotating shaft; 83-first driving wheel; 84-second driving wheel; 85-third driving wheel; 86-synchronous belt;

[0024] 91 - second vertical plate; 92 - second rotating shaft; 93 - third rotating shaft; 94 - fourth driving wheel; 95 - fifth driving wheel; 96 - sixth driving wheel; 97 - third driving plate; 98 - push rod;

[0025] 101-fixed plate; 102-T-shaped plate; 103-guide groove. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] The terms "including" and "having," as used in the present description and accompanying drawings, and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements and may include steps or elements that are not listed.

[0028] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] Next, a PCBA board solder paste printing device provided by an embodiment of the present invention is described in detail. Figures 1 to 7The device includes a jig plate 1 and a clamping member 3. The jig plate 1 serves as the primary carrier for positioning the PCBA board 4 and the steel sheet 2. A first positioning portion is provided on the jig plate 1 for positioning the PCBA board 4. The first positioning portion can be provided in a variety of ways, such as vacuum adsorption, positioning with a limit groove, positioning with a limit column, positioning with a pressure plate, etc. No further restrictions are imposed here. As long as the PCBA board 4 can be accurately positioned on the jig plate 1, all such methods fall within the scope of protection of the present invention. It should be noted that when positioning the PCBA board 4 with the first positioning portion, the side of the PCBA board 4 on which solder paste is to be printed should be exposed, providing the necessary conditions for the bonding of the steel sheet 2 and the PCBA board 4.

[0030] The jig plate 1 also includes a second positioning portion 11 located on the periphery of the PCBA board 4. This second positioning portion 11 extends in a first direction perpendicular to the PCBA board 4. Specifically, one end of the second positioning portion 11 is located on the top surface of the jig plate 1, and the other end extends away from the top surface of the jig plate 1 in the first direction, thereby forming a second positioning portion 11 with a certain extension length. Furthermore, the sidewall of the second positioning portion 11 facing the PCBA board 4 is parallel to the first direction. The first direction is the direction perpendicular to the PCBA board 4 or the surface of the PCBA board 4 after the PCBA board 4 is positioned on the jig plate 1.

[0031] The clamping member 3 is movable along a first direction and can be clamped to the outer edge of the steel sheet 2. The portion of the steel sheet 2 clamped by the clamping member 3 does not need to be in contact with the PCBA board 4; it is sufficient to ensure that the portion of the steel sheet 2 with the hole in the middle is in contact with the PCBA board 4. When clamping the steel sheet 2, the clamping member 3 can maintain parallelism between the steel sheet 2 and the PCBA board 4. Furthermore, the clamping member 3 is an active member, providing the force for the steel sheet 2 to move toward or away from the PCBA board 4.

[0032] In addition, when the clamping member 3 clamps the steel sheet 2, it is not necessary to provide sufficient clamping force to ensure that the clamping member 3 and the steel sheet 2 do not move relative to each other in the direction. It is only necessary to ensure that the clamping member 3 can limit the displacement of the steel sheet 2 in the first direction, that is, the steel sheet 2 and the clamping member 3 are relatively fixed in the first direction, and there are no excessive restrictions on whether the steel sheet 2 and the clamping member 3 move relative to each other in the direction parallel to the steel sheet 2.

[0033] On the basis that the steel sheet 2 and the clamping member 3 are relatively fixed in the first direction, when the clamping member 3 moves along the first direction, the steel sheet 2 can also move synchronously in the first direction; when the steel sheet 2 gradually approaches the PCBA board 4, at a certain position (the position before the steel sheet 2 and the PCBA board 4 are bonded), the outer periphery of the steel sheet 2 abuts against the side wall of the second positioning portion 11, and under the limiting and guiding action of the second positioning portion 11, the steel sheet 2 can only move along the first direction between this position and the position bonded with the PCBA board 4, thereby ensuring that the steel sheet 2 and the PCBA board 4 will not be misaligned in the board surface direction before or after they are bonded or separated, thereby ensuring the printing effect of the solder paste.

[0034] In summary, the present invention positions the PCBA board 4 on the jig plate 1 through the first positioning portion to ensure the position accuracy of the PCBA board 4. A second positioning portion 11 extending in a direction perpendicular to the PCBA board 4 is provided on the outer periphery of the PCBA board 4. The outer periphery of the steel sheet 2 abuts against the circumferential side of the second positioning portion 11 to achieve positioning of the steel sheet 2. After both the steel sheet 2 and the PCBA board 4 are positioned, the position where the solder paste is required to be printed on the PCBA board 4 is aligned with the hole in the steel sheet 2. The clamping member 3 can keep the steel sheet 2 parallel to the PCBA board 4 and drive the steel sheet 2 close to or away from the PCBA board 4. Under the limiting action of the second positioning portion 11, the steel sheet 2 moves in a direction perpendicular to the PCBA board 4 and fits with the PCBA board 4 at a preset position. Therefore, during the alignment and separation process between the steel sheet 2 and the PCBA board 4, relative displacement can only occur in the direction perpendicular to the PCBA board 4, and no misalignment will occur in the board surface direction of the PCBA board 4, thereby improving the printing effect of the solder paste.

[0035] It should be pointed out that the holes on the steel sheet 2 are pre-opened holes, and each hole can correspond to the position on the PCBA board 4 where the solder paste needs to be printed; when the steel sheet 2 is positioned by the second positioning portion 11, and the PCBA board 4 is positioned by the first positioning portion, in the first direction, the holes on the steel sheet 2 precisely correspond to the positions on the PCBA board 4 where the solder paste needs to be printed, thereby realizing rapid and accurate positioning of the steel sheet 2 and the PCBA board 4.

[0036] In some embodiments, the second positioning portion 11 includes a second positioning frame 111 provided on the top surface of the jig plate 1. The second positioning frame 111 can be a continuous or discontinuous frame structure, and the frame structure of the second positioning frame 111 is used to enclose a storage space for accommodating the steel sheet 2. When the steel sheet 2 is placed in the second positioning frame 111, it is sufficient to ensure that the second positioning frame 111 has sufficient frame structure to limit the periphery of the steel sheet 2, thereby limiting the steel sheet 2 in directions other than the first direction, and ensuring that the steel sheet 2 is fixed relative to the second positioning frame 111 in any direction in its plane, wherein the above-mentioned any direction includes the direction of forming translation and the direction of forming rotation, etc.

[0037] Furthermore, considering that the outer periphery of the steel sheet 2 must first abut against the sidewalls of the second positioning frame 111 before the steel sheet 2 is bonded to the PCBA board 4, the second positioning frame 111 can be positioned so as to extend beyond the bonding surface of the PCBA board 4 and the steel sheet 2 in the first direction. This ensures that the steel sheet 2 is first constrained and positioned by the second positioning frame 111 before bonding to the PCBA board 4. Similarly, after the steel sheet 2 is separated from the PCBA board 4, the steel sheet 2 can be constrained by the second positioning frame 111 by a certain distance to prevent misalignment between the steel sheet 2 and the PCBA board 4 within this distance. The distance at which the steel sheet 2 is constrained by the second positioning frame 111 should be sufficient to completely separate the solder paste on the steel sheet 2 and the PCBA board 4, thereby preventing the solder paste on the PCBA board 4 from being scraped by the steel sheet 2 due to insufficient restraint distance.

[0038] As mentioned above, the purpose of the clamping member 3 is, on the one hand, to maintain the parallelism between the steel sheet 2 and the PCBA board 4, and on the other hand, to constrain the steel sheet 2 in the first direction, ensuring that the clamping member 3 and the steel sheet 2 can move synchronously in the first direction. Although the clamping member 3 does not need to completely clamp the steel sheet 2, completely clamping the steel sheet 2 can also achieve the technical effects of the present invention and thus falls within the scope of protection of the present invention.

[0039] However, for the method in which the clamping member 3 completely clamps the steel sheet 2, the steel sheet 2 and the second positioning frame 111 need to maintain a high alignment accuracy. In actual operation, due to factors such as processing errors and assembly errors, the alignment efficiency of the steel sheet 2 and the second positioning frame 111 is low; therefore, the present invention adopts the method of roughly positioning the steel sheet 2 by the clamping member 3 and finely positioning the steel sheet 2 by the second positioning frame 111, so that the steel sheet 2 can be quickly and accurately positioned by the second positioning frame 111.

[0040] Specifically, the clamping member 3 includes a plurality of clamps 31 distributed on the outer periphery of the steel sheet 2. The side of the clamping member 31 facing the steel sheet 2 is provided with a clamping groove 311 for clamping the steel sheet 2. When the clamping groove 311 clamps the steel sheet 2, the two clamping walls of the clamping groove 311 can respectively abut against the two sides of the steel sheet 2, so that the clamping groove 311 and the steel sheet 2 are clamped in the upper limit position in the first direction, thereby realizing the rough positioning of the steel sheet 2 by the clamping member 3; but the clamping wall does not apply a clamping force to the steel sheet 2 or applies a smaller clamping force to the steel sheet 2, ensuring that the steel sheet 2 can move in the clamping groove 311 in a direction parallel to the plane where the steel sheet 2 is located. When the clamping wall does not apply a clamping force to the steel sheet 2, the movement of the steel sheet 2 in the clamping groove 311 is more flexible and smooth, and it is easier to adjust the alignment of the steel sheet 2 with the second positioning frame 111; when the clamping wall applies a smaller clamping force to the steel sheet 2, the friction between the steel sheet 2 and the clamping wall can be increased, making the steel sheet 2 more stable in the clamping groove 311, thereby facilitating improving the rough positioning effect of the clamping member 3 on the steel sheet 2.

[0041] In addition, in order to ensure that the clamping member 3 can make the steel sheet 2 parallel to the PCBA board 4, the clamping grooves 311 of the multiple clamps 31 can be set in the same plane parallel to the PCBA board 4, or in other words, the upper clamping walls of the multiple clamping grooves 311 are in the same plane parallel to the PCBA board 4, and the lower clamping walls of the multiple clamping grooves 311 are in the same plane parallel to the PCBA board 4, so that the steel sheet 2 located in the clamping grooves 311 can remain parallel to the PCBA board 4.

[0042] Considering that the rough positioning effect of the clamping member 3 cannot ensure that the steel sheet 2 is accurately aligned with the second positioning frame 111 every time when the steel sheet 2 is about to enter the second positioning frame 111, a guide structure such as a chamfered structure, a sloped structure or an arc structure can be provided on the top inner edge of the second positioning frame 111. When the steel sheet 2 is not aligned with the second positioning frame 111, the guide structure can play a certain corrective role on the steel sheet 2, so that the steel sheet 2 is gradually accurately aligned with the second positioning frame 111. It is worth noting that a guide structure can be provided on each frame structure of the second positioning frame 111 to ensure that the guide structure can have a corrective effect on each side of the steel sheet 2, thereby ensuring the alignment accuracy of the steel sheet 2 with the second positioning frame 111.

[0043] Since the clamp 31 is arranged on the outer edge of the steel sheet 2, and the second positioning frame 111 needs to abut against the outer periphery of the steel sheet 2, the existence of the clamp 31 may affect the normal abutment between the second positioning frame 111 and the steel sheet 2. In the present invention, an avoidance portion 13 can be provided in the second positioning frame 111, and the avoidance portion 13 corresponds to the clamp 31 in the first direction. When the steel sheet 2 abuts against the second positioning frame 111, the clamp 31 can enter the avoidance portion 13, thereby avoiding interference between the second positioning frame 111 and the clamp 31 in the first direction, affecting the normal entry of the steel sheet 2 into the second positioning frame 111.

[0044] The avoidance portion 13 can be an avoidance groove provided on the second positioning frame 111 , and the avoidance groove is adapted to the shape of the clamp 31 , or the size of the avoidance groove is slightly larger than the clamp 31 , so that the clamp 31 can smoothly enter the avoidance groove.

[0045] In some embodiments, to enhance the positioning and stabilization of the steel sheet 2, the steel sheet 2 may be a rectangular sheet. Multiple clamps 31 are positioned at the four right corners of the steel sheet 2. The clamping grooves 311 on the clamps 31 are right-angled grooves that align with the right angles of the steel sheet 2. When the steel sheet 2 engages with the clamping grooves 311, the four corners of the steel sheet 2 can be inserted into the clamping grooves 311 of the clamps 31. This constrains the right-angle position of the steel sheet 2 and positions the steel sheet 2 parallel to the PCBA board 4. Accordingly, the second positioning frame 111 is a rectangular frame that matches the shape of the steel sheet 2. The avoidance portion 13 includes a first avoidance groove 131 positioned at the right-angled corners of the second positioning frame 111.

[0046] After the four clamps 31 complete the rough positioning of the steel sheet 2, that is, after the four corners of the steel sheet 2 are inserted into the clamping groove 311, the steel sheet 2 is parallel to the PCBA board 4, and the steel sheet 2 and the clamping groove 31 remain relatively fixed in the first direction. However, the clamping groove 311 should reserve a preset space for the steel sheet 2 to move horizontally along its planar direction in the direction parallel to the steel sheet 2, so that the steel sheet 2 can move relative to the clamping groove 31 in the planar direction of the steel sheet 2, ensuring that when the steel sheet 2 is not precisely aligned with the second positioning frame 111, a certain amount of moving space can be provided for the steel sheet 2, thereby allowing the steel sheet 2 to move to be precisely aligned with the second positioning hole.

[0047] It should be pointed out that the multiple clamps 31 of the present invention include but are not limited to being set at the right angles of the steel sheet 2, and can also be distributed on the four sides of the steel sheet 2 to ensure that the steel sheet 2 can be stably supported and the clamps 31 and the steel sheet 2 can be kept relatively fixed in the first direction. No excessive restrictions are made here, and all fall within the scope of protection of the present invention.

[0048] In addition, in order to improve the fitting stability between the PCBA board 4 and the steel sheet 2, the fitting surface of the PCBA board 4 and the steel sheet 2 can be made coplanar with the top surface of the jig plate 1. At this time, a part of the steel sheet 2 can be fitted on the PCBA board 4, and the other part, because it extends beyond the PCBA board 4, can be fitted on the top surface of the jig plate 1, so that the jig plate 1 and the PCBA board 4 can jointly fit and support the steel sheet 2, ensuring the fitting effect between the steel sheet 2 and the PCBA board 4.

[0049] On the basis of the above embodiment, since the fitting surface of the PCBA board 4 and the steel sheet 2 needs to be coplanar with the top surface of the jig plate 1, the first positioning portion can be a positioning groove 12 opened on the top surface of the jig plate 1, and the PCBA board 4 is located in the positioning groove 12, and the upper plate surface of the PCBA board 4 can be flush with the top surface of the jig plate 1; the positioning groove 12 can limit the outer periphery of the PCBA board 4 to prevent the PCBA board 4 from moving in the direction of its plate surface, and at the same time, a vacuum adsorption component can be set in the positioning groove 12 to realize the positioning of the PCBA board 4 in the first direction.

[0050] It should be pointed out that in order to ensure that the bonding surface of the PCBA board 4 and the steel sheet 2 is coplanar with the top surface of the fixture plate 1, it is also necessary to ensure that the lower clamping wall of the clamping groove 311 is coplanar with the top surface of the fixture plate 1. At this time, the bottom surface of the steel sheet 2 can be bonded with the top surface of the fixture plate 1; but since there is a certain distance between the lower clamping wall of the clamping groove 311 and the bottom surface of the clamping groove 311, in order to achieve the coplanarity of the lower clamping wall of the clamping groove 311 and the top surface of the fixture plate 1, it is also necessary to set a position on the fixture plate 1 that is aligned with the first avoidance groove 131. The corresponding second avoidance groove 132, the clamping head 31 can enter the first avoidance groove 131 and the second avoidance groove 132 in sequence in the first direction. After the clamping head 31 enters the second avoidance groove 132, the portion between the lower clamping wall of the clamping groove 311 and the bottom surface of the clamping groove 311 corresponds to the second avoidance groove 132, so that the lower clamping wall of the clamping groove 311 and the top surface of the fixture plate 1 are coplanar. At this point, the lower clamping wall of the clamping groove 311, the fitting surface of the PCBA board 4 and the steel sheet 2, and the top surface of the fixture plate 1 can be coplanar.

[0051] In addition, the clamping member also includes connecting plates 32 provided on two opposite sides of the steel sheet 2. The connecting plates 32 can be located at both ends of the length direction of the steel sheet 2, or at both ends of the width direction of the steel sheet 2, without further limitation. The clamping heads 31 on the two opposite sides of the steel sheet 2 are respectively fixedly connected to the corresponding connecting plates 32. Taking the connecting plates 32 provided at both ends of the length direction of the steel sheet 2 as an example, the two clamping heads 31 at one end of the length direction of the steel sheet 2 are fixedly connected to one connecting plate 32, and the two clamping heads 31 at the other end of the length direction of the steel sheet 2 are fixedly connected to the other connecting plate 32.

[0052] Taking into account that the existence of the connecting plate 32 may interfere with the second positioning frame 111 in the first direction, affecting the positioning of the steel sheet 2 by the second positioning frame 111, a gap for accommodating the second positioning frame 111 can be set between the connecting plate 32 and the side of the steel sheet 2, that is, the connecting plate 32 can adopt a C-shaped structure, and the two ends of the C-shaped structure are respectively connected to two clamps 31, and there is a gap between the middle part of the C-shaped structure and the steel sheet 2; when the steel sheet 2 enters the second positioning frame 111, the frame structure of the second positioning frame 111 can enter the above-mentioned gap, thereby avoiding interference between the clamping member 3 and the frame structure of the second positioning frame 111 in the first direction.

[0053] To install or remove the steel sheet 2 from the clamping member 3, the two connecting plates 32 can be moved away from or closer to each other in a direction parallel to the steel sheet 2. That is, the two connecting plates 32 are relatively movable in a direction parallel to the steel sheet 2, thereby achieving the two connecting plates 32 moving away from or closer to each other. Furthermore, one connecting plate 32 can be fixed and the other can be movable; alternatively, both connecting plates 32 can be movable.

[0054] The clamping member 3 also includes second drive members 33, which are located on either side of the fixture plate 1 and correspond to the two connecting plates 32. The second drive members 33 can be powered cylinders, such as electric cylinders, pneumatic cylinders, or hydraulic cylinders. The power end of the second drive member can move in the first direction. A support plate 34 is provided on the power end of the second drive member 33, and the connecting plates 32 are mounted on this support plate 34. The extension and retraction of the second drive members 33 drives the clamping member 3 to move, and the second drive members 33 on both sides must move synchronously to ensure that the steel sheet 2 can move in the first direction parallel to the PCBA board 4.

[0055] For the method in which one connecting plate 32 is fixed and the other connecting plate 32 is movably set, one connecting plate 32 can be fixed on a support plate 34, and the other connecting plate 32 can be movably set on the support plate 34, and the movable direction is parallel to the direction of the steel sheet 2; for the method in which both connecting plates 32 are movably set, both connecting plates 32 can be movably set on the support plate 34, and the movable direction is parallel to the direction of the steel sheet 2.

[0056] In addition, for the movably arranged connecting plate 32, a fixed block 35 can be provided on the support plate 34 movably connected to the connecting plate 32, and a guide rod 36 is provided through the fixed block 35. The guide rod 36 can be slidably arranged relative to the fixed block 35. Under the limiting action of the fixed block 35, the guide rod 36 can move along its axial direction; wherein, the number of the fixed blocks 35 and the guide rods 36 can be set to multiple, the fixed blocks 35 and the guide rods 36 correspond one to one, and the axial direction of the guide rod 36 is parallel to the steel sheet 2. The guide rod 36 is fixedly connected to the connecting plate 32, and the connecting plate 32 maintains contact with the support plate 34, so that the support plate 34 provides a stable sliding support effect for the connecting plate 32; a second spring 37 is sleeved on the outer periphery of the guide rod 36, and the two ends of the second spring 37 are respectively connected to the connecting plate 32 and the fixed block 35, and the second spring 37 has an initial compression amount. The second spring 37 provides an elastic force for the sliding connecting plate 32 to move toward the other connecting plate 32, so that under the action of the elastic force, the clamps 31 on the two connecting plates 32 can press against the steel sheet 2.

[0057] In addition, since there is a gap between the connecting plate 32 and the steel sheet 2, the fingers can move the movable connecting plate 32 at this gap to drive the clamp 31 to disengage the steel sheet 2, thereby removing the steel sheet 2 from the clamping member 3. When clamping the steel sheet 2, the movable clamping member 3 is first slid away from the fixed clamping member 3, and then the two corners at one end of the steel sheet 2 are inserted into the clamping groove 311 of the fixed clamping member 3. The sliding clamping member 3 is then slid toward the fixed clamping member 3 to ensure that the steel sheet 2 is stably clamped. When the actuating end of the second driving member 33 is extended, the support plate 34 rises, and the clamping member 3 rises while holding the steel sheet 2, thereby separating from the PCBA board 4 in the first direction. When the actuating end of the second driving member 33 is retracted, the support plate 34 descends, causing the steel sheet 2 to move toward the PCBA board 4 in the first direction until it is in close contact with the PCBA board 4.

[0058] As pointed out above, the first positioning portion can be a positioning groove 12 opened on the jig plate 1. After the PCBA board 4 is placed in the positioning groove 12 and positioned, the fitting surface of the PCBA board 4 and the steel sheet 2 can be flush with the top surface of the jig plate 1, or it can be not flush with the top surface of the jig plate 1. It is sufficient to ensure that the fitting surface of the PCBA board 4 and the steel sheet 2 is not lower than the top surface of the jig plate 1, which falls within the protection scope of the present invention.

[0059] The positioning slots 12 provide a positioning effect on the PCBA 4, such that the PCBA 4 remains fixed relative to the positioning slots 12 in any direction within its plane, including both translational and rotational directions. This effect is achieved, for example, by the positioning slots 12 abutting against the outer periphery of the PCBA 4. In the first direction, the PCBA 4 is movable relative to the positioning slots 12, facilitating placement and removal of the PCBA 4 from the positioning slots 12.

[0060] Furthermore, to prevent the PCBA board 4 from directly sliding against the inner wall of the positioning groove 12, which could damage the PCBA board 4, the first positioning portion of the present invention further includes a positioning plate 7 disposed within the positioning groove 12. The outer periphery of the positioning plate 7 abuts against the inner wall of the positioning groove 12, while the PCBA board 4 is fixedly mounted on the positioning plate 7. The positioning plate 7 is movable in a first direction relative to the positioning groove 12. It can be seen that the positioning groove 12 can position the positioning plate 7, ensuring that the PCBA board 4 is positioned on the positioning plate 7. The provision of the positioning plate 7 prevents direct sliding contact between the PCBA board 4 and the inner wall of the positioning groove 12, thereby ensuring the safety of the PCBA board 4.

[0061] In order to fix the PCBA board 4 on the positioning plate 7, a first positioning frame 71 extending along a first direction can be provided on the top surface of the positioning plate 7. The first positioning frame 71 encloses a space having a notch 73 on one side for accommodating the PCBA board 4. The PCBA board 4 can enter and exit the first positioning frame 71 via the notch 73. After the PCBA board 4 enters the first positioning frame 71, the outer periphery of the PCBA board 4 can abut against the first positioning frame 71, thereby limiting the position of the PCBA board 4. Specifically, the notch 73 on the first positioning frame 71 can be located on one side of the first positioning frame 71 in the width direction. Rounded corners that conform to the curved surface of the PCBA board 4 can be provided on both sides of the length direction and the other side of the width direction of the first positioning frame 71. As for the outer contours of other shapes of the PCBA board 4, they will not be described in detail here. It is sufficient to ensure that the inner wall of the first positioning frame 71 corresponds to and conforms to the outer contour of the PCBA board 4.

[0062] A liftable baffle 72 is provided on one side of the positioning plate 7 having the notch 73. Specifically, the baffle 72 is movably arranged along a first direction, and the baffle 72 has at least two positions. The baffle 72 in the first position is higher than the top surface of the positioning plate 7, so that the baffle 72 abuts against the side of the PCBA board 4, and cooperates with the first positioning frame 71 to position and limit the PCBA board 4 from the circumference of the PCBA board 4; the baffle 72 in the second position can be lower than the top surface of the positioning plate 7, so that the baffle 72 is disengaged from the side of the PCBA board 4, and the first positioning frame 71 releases the positioning limit on the PCBA board 4.

[0063] Furthermore, the baffle 72 includes a positioning segment 721 extending along the first direction and a connecting segment 722 perpendicular to the positioning segment 721, that is, the baffle 72 is L-shaped as a whole; a through hole corresponding to the positioning segment 721 is provided on the positioning plate 7, and the positioning segment 721 can move in the through hole, and the positioning segment 721 can be in contact with or out of contact with the side of the PCBA board 4.

[0064] The connecting section 722 is located on the lower side of the positioning plate 7. The connecting section 722 interferes with the through hole on the positioning plate 7 in the first direction, so that the positioning section 721 has an upper limit of movement in the first direction, preventing the positioning section 721 from exceeding the upper plate surface of the PCBA board 4; in addition, the connecting section 722 and the positioning plate 7 can also be connected by a first spring 76, which is used to provide an elastic force for the baffle 72 to move toward the first position.

[0065] The first spring 76 has an initial stretching amount, thereby providing an elastic force for the baffle 72 to move toward the first position; or, it is fixed to the bottom surface of the positioning plate 7 through the mounting plate 75, and the mounting plate 75 is L-shaped, and the top surface of the vertical section of the mounting plate 75 is fixed to the bottom surface of the positioning plate 7, and one end of the first spring 76 is fixed to the top surface of the horizontal section of the mounting plate 75, and the other end of the first spring 76 is fixed to the bottom surface of the connecting section 722 of the baffle 72. The first spring 76 has an initial compression amount, and the first spring 76 applies a force on the baffle 72 to move the baffle 72 upward. When there is no external force, the first positioning frame 71 and the baffle 72 limit the PCBA board 4 to prevent the PCBA board 4 from displacement. In addition, since the horizontal section of the mounting plate 75 corresponds to the connecting section 722 of the baffle 72 , the positioning section 721 can also have a movable lower limit in the first direction, preventing the positioning section 721 of the baffle 72 from escaping from the through hole on the positioning plate 7 .

[0066] The printing device of the present invention also includes a base plate 5, and the jig plate 1 is fixedly connected to the base plate 5 through a support rod. The support rod lifts the jig plate 1 so that there is a certain distance between the jig plate 1 and the base plate 5; the positioning plate 7 is set on the base plate 5 through a first driving member 74. The first driving member 74 can be a power cylinder such as an electric cylinder, a pneumatic cylinder, a hydraulic cylinder, etc. The first driving member 74 is distributed on both sides of the positioning plate 7 and is located on the lower side of the jig plate 1. The power end of the first driving member 74 moves along the first direction. The power end of the first driving member 74 is connected to the positioning plate 7. When the action end of the first driving member 74 is extended, the positioning plate 7 rises. When the action end of the first driving member 74 is retracted, the positioning plate 7 falls. The positioning plate 7 can be movably arranged between the jig plate 1 and the base plate 5, so that the positioning plate 7 can enter and exit the positioning groove 12. In addition, the second driving member 33 is also arranged on the base plate 5.

[0067] A plurality of first vertical plates 81 are provided on the base plate 5, with two first vertical plates 81 forming a group. A first rotating shaft 82 is provided between the two first vertical plates 81 in a group. The first rotating shaft 82 is rotatably arranged relative to the first vertical plates 81, and a coaxial first drive wheel 83 and a second drive wheel 84 are fixedly mounted on the first rotating shaft 82. A first drive plate 723 is provided on the baffle plate 72, located below the positioning plate 7, and a second drive plate 77 is provided on the bottom surface of the positioning plate 7. Both the first drive plate 723 and the second drive plate 77 extend in a first direction. The second drive plate 77 is in transmission connection with the second drive wheel 84, and the first drive plate 723 is in transmission connection with the first drive wheel 83. The first drive plate 723 and the second drive plate 77 move in the same direction, and the speed of the first drive plate 723 is greater than that of the second drive plate 77.

[0068] When the positioning plate 7 descends, the second driving plate 77 descends synchronously with the positioning plate 7, and the second driving plate 77 drives the second driving wheel 84 to rotate. The second driving wheel 84 drives the first driving wheel 83 to rotate synchronously under the action of the first rotating shaft 82, and the first driving wheel 83 can drive the first driving plate 723 to descend. However, since the descending speed of the first driving plate 723 is greater than that of the second driving plate 77, the descending speed of the baffle 72 will be faster, and the baffle 72 will be displaced downward relative to the positioning plate 7; as the positioning plate 7 continues to descend, the positioning plate 7 will be at a certain position, causing the baffle 72 to overcome the elastic force of the first spring 76 and reach the first position, that is, the baffle 72 is lower than the top surface of the positioning plate 7, and the PCBA board 4 can slide out from the notch 73.

[0069] On the contrary, when the positioning plate 7 rises, the corresponding second driving wheel 84 will rotate in the opposite direction, so that the first driving wheel 83 drives the first driving plate 723 to move upward in the opposite direction, and the baffle 72 will be displaced upward relative to the positioning plate 7, so that the baffle 72 reaches the second position at a certain position, that is, the baffle 72 is higher than the top surface of the positioning plate 7. At this time, the PCBA board 4 will be positioned and limited in the first positioning frame 71.

[0070] Furthermore, the first drive wheel 83 and the second drive wheel 84 may be rubber wheels, and the surface of the first drive plate 723 in contact with the first drive wheel 83 and the surface of the second drive wheel 84 in contact with the second drive plate 77 are both provided with a silicone surface, thereby achieving a transmission connection between the first drive plate 723 and the first drive wheel 83, and between the second drive plate 77 and the second drive wheel 84 through friction. Furthermore, the first drive plate 723 and the first drive wheel 83 may also be transmission-connected using a rack and pinion arrangement, i.e., the first drive wheel 83 is a gear, and the first drive plate 723 is a rack, with the meshing of the gear and rack achieving transmission connection. Similarly, the second drive plate 77 and the second drive wheel 84 may also be transmission-connected using a rack and pinion arrangement, which will not be further described here.

[0071] In order to achieve that the speed of the first drive plate 723 is higher than the speed of the second drive plate 77, the outer diameter of the first drive wheel 83 can be made larger than the outer diameter of the second drive wheel 84. Under the same rotation speed of the first drive wheel 83 and the second drive wheel 84, the linear speed at the intersection of the first drive wheel 83 and the first drive plate 723 is greater than the linear speed at the intersection of the second drive wheel 84 and the second drive plate 77, so that the speed of the first drive plate 723 is higher than the speed of the second drive plate 77, thereby causing the baffle 72 and the positioning plate 7 to be relatively displaced in the first direction; it should be noted that, within the movable range of the positioning plate 7, the baffle 72 can move to the first position and the second position. In other words, when the positioning plate 7 rises or falls to realize the linkage of the baffle 72, the baffle 72 can reach the first position during the rising process of the positioning plate 7, and the baffle 72 can reach the second position during the descending process of the positioning plate 7.

[0072] In order to ensure the linkage effect between the positioning plate 7 and the baffle 72, two groups of first vertical plates 81 can be set on the base plate 5. The two groups of first vertical plates 81 are respectively located on both sides of the length direction of the baffle 72, and the corresponding number of first drive plates 723 and second drive plates 77 is also two. The two first drive plates 723 are arranged on both sides of the length direction of the baffle 72, and the two second drive plates 77 are also arranged on both sides of the length direction of the baffle 72. In this way, the two sides of the baffle 72 can be affected by the linkage effect synchronized with the positioning plate 7, so that the baffle 72 can be stably raised or lowered.

[0073] A plurality of second vertical plates 91 are also provided on the base plate 5, and two second vertical plates 91 form a group. The first vertical plate 81 is located on the side of the positioning plate 7 having the notch 73, and the second vertical plate 91 is located on the side of the positioning plate 7 opposite to the notch 73; a parallel second rotating shaft 92 and a third rotating shaft 93 are provided between the two second vertical plates 91 in a group of second vertical plates 91, and the second rotating shaft 92 and the third rotating shaft 93 are both rotatably connected to the second vertical plate 91, and a coaxial fourth driving wheel 94 and a fifth driving wheel 95 are fixed on the second rotating shaft 92, and a sixth driving wheel 96 is provided on the third rotating shaft 93. One side of the sixth driving wheel 96 is transmission-connected to the fifth driving wheel 95, and the other side is transmission-connected to the third driving plate 97. A push rod 98 is provided on the third driving plate 97, and the push rod 98 passes through the first positioning frame 71 to push the PCBA board 4 toward the notch 73.

[0074] Specifically, a third drive wheel 85 is further provided on the first rotating shaft 82, and the third drive wheel 85 is connected to the fourth drive wheel 94 via a synchronous belt 86. When the positioning plate 7 descends, the third drive wheel 85 can drive the fourth drive wheel 94 to rotate via the synchronous belt 86, and the fourth drive wheel 94 drives the fifth drive wheel 95 to rotate under the action of the second rotating shaft 92. The fifth drive wheel 95 can drive the sixth drive wheel 96 to rotate, and the sixth drive wheel 96 can drive the third drive plate 97 to rotate, thereby realizing the movement of the push rod 98.

[0075] The transmission connection between the third drive wheel 85 and the synchronous belt 86, and between the fourth drive wheel 94 and the synchronous belt 86, can both adopt a gear chain transmission mode. The fifth drive wheel 95 and the sixth drive wheel 96 can adopt a rubber wheel friction transmission connection or a gear meshing transmission connection. The sixth drive wheel 96 and the third drive plate 97 can adopt a gear rack or a rubber wheel silicone surface transmission connection. For details, please refer to the transmission connection mode between the first drive wheel 83 and the first drive plate 723, which will not be repeated here. It should be noted that the above-mentioned transmission connection modes include but are not limited to the ones given above, which will not be described in detail here, and all fall within the scope of protection of the present invention.

[0076] A through hole for the push rod 98 to pass through is opened on the side wall of the first positioning frame 71. The through hole is a vertical waist-shaped hole. The end of the push rod 98 close to the through hole is arc-shaped. The push rod 98 passes through the through hole and pushes the PCBA board 4; specifically, when the positioning plate 7 descends, the baffle 72 switches from the first position to the second position, and the push rod 98 moves toward the notch 73. When the baffle 72 reaches the second position, the push rod 98 contacts the side of the PCBA board 4, and as the positioning plate 7 continues to descend, the push rod 98 pushes the PCBA board 4 out of the first positioning frame 71, thereby realizing the linkage between the push rod 98 and the positioning plate 7.

[0077] When the positioning plate 7 is lifted up, the baffle 72 switches from the second position to the first position, and the push rod 98 moves in the direction away from the notch 73. When the baffle 72 is about to reach the first position, the end of the push rod 98 can move inside the first positioning frame 71 until it is flush with the inner wall of the first positioning frame 71 or enters the inner wall of the first positioning frame 71. At this time, the baffle 72 does not exceed the top surface of the positioning plate 7, and the PCBA board 4 can enter the first positioning frame 71 through the notch 73. After the PCBA board 4 completely enters the first positioning frame 71, as the positioning plate 7 continues to rise, the baffle 72 will reach the first position, that is, the positioning section 721 of the baffle 72 abuts against the side wall of the PCBA board 4, thereby realizing the linked positioning of the PCBA board 4.

[0078] To ensure that the push rod 98 can smoothly push the PCBA board 4 out of the first positioning frame 71, two groups of second vertical plates 91 can be set on the bottom plate 5. The two groups of second vertical plates 91 correspond to the two groups of first vertical plates 81 respectively. The fourth driving wheel 94 on each group of second vertical plates 91 corresponds to the third driving wheel 85 on each group of first vertical plates 81. Under the action of the synchronous belt 86, the fourth driving wheel 94 rotates synchronously, thereby realizing the synchronous rotation of the sixth driving wheel 96, and then the two push rods 98 move synchronously. The two push rods 98 can act on the PCBA board 4 synchronously, so that the side of the PCBA board 4 close to the push rod 98 is synchronously force-bearing and smoothly pushed out of the first positioning frame 71.

[0079] In addition, since the push rod 98 needs to move a longer path to completely push the PCBA board 4 out of the first positioning frame 71, the fifth drive wheel 95 can be a small-diameter wheel and the sixth drive wheel 96 can be a large-diameter wheel, so that the push rod 98 has a larger stroke to meet the requirement of pushing the PCBA board 4 out of the first positioning frame 71.

[0080] As mentioned above, there are two third drive plates 97 . A T-shaped plate 102 fixed to the base plate 5 is provided between the two third drive plates 97 . A fixed plate 101 fixed to the base plate 5 is provided on the opposite side of the two third drive plates 97 . The fixed plate 101 and the T-shaped plate 102 are provided with guide grooves 103 . The third drive plate 97 is provided with a guide block that cooperates with the guide grooves 103 . The guide direction of the guide grooves 103 is set along the axial direction of the push rod 98 , thereby providing the push rod 98 with a stable pushing effect. Of course, the guiding effect of the push rod 98 can also be achieved by using a guide rail slider, that is, a slide rail is provided on the T-shaped plate 102 and the fixed plate 101 , and the third drive plate 97 is a guide block that cooperates with the slide rail, or a guide block that cooperates with the slide rail is provided on the third drive plate 97 , thereby supporting and guiding the third drive plate 97 .

[0081] The printing device also includes a collecting plate 6 arranged on the bottom plate 5 and located on the side of the positioning plate 7 having a notch 73. The collecting plate 6 includes an inclined portion 61 and a horizontal portion 62. The inclined portion 61 is inclined downward from close to the positioning plate 7 to away from the positioning plate 7. The horizontal portion 62 is connected to the lowest side of the inclined portion 61. The highest side position of the inclined portion 61 is lower than the lowest position after the positioning plate 7 is lowered.

[0082] During the descending process of the baffle 72, the push rod 98 extends into the first positioning frame 71. When the top surface of the positioning section 721 of the baffle 72 is flush with the top surface of the positioning plate 7, the push rod 98 contacts the PCBA board 4. When the positioning section 721 of the baffle 72 continues to descend, the push rod 98 pushes the PCBA board 4 toward the collecting plate 6. Under the guidance of the inclined portion 61, the PCBA board 4 slides down along the inclined portion 61 to the horizontal portion 62, thereby realizing automatic stripping and unloading of the PCBA board 4.

[0083] When solder paste printing is performed, the PCBA board 4 is first placed in the first positioning frame 71, the actuating end of the first driving member 74 extends, the positioning plate 7 rises, and the baffle 72 rises in conjunction to achieve positioning of the PCBA board 4. When the PCBA board 4 enters the positioning groove 12 and the PCBA board 4 is flush with the top surface of the jig plate 1, the first driving member 74 stops moving.

[0084] Then, the steel sheet 2 is clamped by the clamping member 3, and the actuating end of the second driving member 33 is retracted, so that the steel sheet 2 and the PCBA board 4 are in close contact. Under the limit of the second positioning frame 111, the holes on the steel sheet 2 and the positions of the PCBA board 4 where the solder paste is to be printed are automatically and quickly aligned.

[0085] Then, solder paste is brushed on the steel sheet 2. After printing is completed, the actuating end of the second driving member 33 extends to separate the steel sheet 2 and the PCBA board 4 along the first direction. Then, the actuating end of the first driving member 74 retracts to lower the positioning plate 7 with the PCBA board 4.

[0086] When the positioning plate 7 is lowered, the baffle 72 is linked to the baffle 72 and lowered until the top surface of the positioning section 721 of the baffle 72 is lower than the top surface of the positioning plate 7.

[0087] During the descent of the baffle 72, the push rod 98 extends into the first positioning frame 71. When the top surface of the positioning section 721 of the baffle 72 is flush with the top surface of the positioning plate 7, the push rod 98 contacts the PCBA board 4. When the vertical section of the baffle 72 continues to descend, the push rod 98 pushes the PCBA board 4 toward the collecting plate 6. Under the guidance of the inclined portion 61, the PCBA board 4 slides down along the inclined portion 61 to the horizontal portion 62, thereby realizing automatic stripping and unloading of the PCBA board 4, making it convenient for staff to take the printed PCBA board 4.

[0088] The above describes in detail a PCBA solder paste printing device provided by an embodiment of the present invention. The various embodiments are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between the various embodiments can be referenced for reference only. The device disclosed in the embodiments corresponds to the method disclosed in the embodiments, so the description is relatively brief. For relevant details, refer to the method description.

[0089] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A PCBA board solder paste printing device, characterized in that: include: A jig plate (1), the jig plate (1) being provided with a first positioning portion for positioning a PCBA board (4), and a second positioning portion (11) located on the periphery of the PCBA board (4), the second positioning portion (11) extending in a first direction perpendicular to the PCBA board (4); A clamping member (3), the clamping member (3) is movably arranged along the first direction, the clamping member (3) is clamped on the outer edge of the steel sheet (2) and keeps the steel sheet (2) and the PCBA board (4) parallel, the steel sheet (2) and the clamping member (3) are relatively fixed in the first direction, the outer periphery of the steel sheet (2) abuts against the second positioning portion (11), and is movably arranged in the first direction relative to the second positioning portion (11), and the steel sheet (2) is in contact with the PCBA board (4) at a preset position; The second positioning portion (11) comprises a second positioning frame (111) provided on the top surface of the jig plate (1), and the second positioning frame (111) encloses and forms an accommodating space for accommodating the steel sheet (2); The clamping member (3) comprises a plurality of clamping heads (31) distributed on the periphery of the steel sheet (2), and a clamping groove (311) for clamping the steel sheet (2) is provided on a side of the clamping head (31) facing the steel sheet (2); The first positioning portion comprises a positioning groove (12) provided on the jig plate (1), the PCBA board (4) being placed in the positioning groove (12), and the fitting surface between the PCBA board (4) and the steel sheet (2) being no lower than the top surface of the jig plate (1).

2. The PCBA board solder paste printing equipment according to claim 1, characterized in that: The steel sheet (2) is fixed relative to the second positioning frame (111) in any direction in the plane where the steel sheet (2) is located, and the second positioning frame (111) extends beyond the fitting surface between the PCBA board (4) and the steel sheet (2) in the first direction.

3. The PCBA board solder paste printing equipment according to claim 2, characterized in that: The clamping groove (311) is clamped with the steel sheet (2) in a limit position in the first direction, and the clamping grooves (311) of the plurality of clamps (31) are located in the same plane parallel to the PCBA board (4).

4. The PCBA board solder paste printing equipment according to claim 3, characterized in that: The second positioning frame (111) is provided with an avoidance portion (13), and the avoidance portion (13) corresponds to the clamping head (31) in the first direction.

5. The PCBA board solder paste printing equipment according to claim 4, characterized in that: The steel sheet (2) is a rectangular sheet, the plurality of clamps (31) are respectively arranged at four right angles of the steel sheet (2), and the clamping grooves (311) are right-angle grooves adapted to the right angles; The second positioning frame (111) is a rectangular frame adapted to the steel sheet (2), and the avoidance portion (13) comprises a first avoidance groove (131) provided at a corner of the second positioning frame (111).

6. The PCBA board solder paste printing equipment according to claim 5, characterized in that: The bonding surfaces of the PCBA board (4) and the steel sheet (2) are coplanar with the top surface of the jig plate (1), and the steel sheet (2) is bonded to the top surface of the jig plate (1); The avoidance portion (13) further includes a second avoidance groove (132) provided on the jig plate (1) and corresponding to the first avoidance groove (131); the clamp (31) located in the second avoidance groove (132) is used to make the lower clamping wall of the clamping groove (311), the fitting surface of the PCBA board (4) and the steel sheet (2), and the top surface of the jig plate (1) coplanar; The clamping member (3) includes connecting plates (32) provided on two opposite sides of the steel sheet (2), the clamping heads (31) on the two opposite sides are respectively fixedly connected to the corresponding connecting plates (32), and a gap for accommodating the second positioning frame (111) is provided between the connecting plates (32) and the side of the steel sheet (2); The two connecting plates (32) are spaced apart from or approached to each other in a direction parallel to the steel sheet (2); The clamping member (3) further includes a second driving member (33) distributed on both sides of the jig plate (1) and corresponding to the two connecting plates (32), the power end of the second driving member (33) moves along the first direction, the power end of the second driving member (33) is provided with a support plate (34), one connecting plate (32) is fixed on one supporting plate (34), and the other connecting plate (32) is movably provided on the other supporting plate (34), and the moving direction is parallel to the direction of the steel sheet (2); A fixing block (35) is provided on the support plate (34) movably connected to the connecting plate (32), and a guide rod (36) is slidably provided on the fixing block (35). The guide rod (36) is fixedly connected to the connecting plate (32), and a second spring (37) is sleeved on the outer periphery of the guide rod (36). The two ends of the second spring (37) are respectively connected to the connecting plate (32) and the fixing block (35). The second spring (37) has an initial compression amount and is used to provide an elastic force for the connecting plate (32) to move toward the other connecting plate (32), and under the action of the elastic force, the clamps (31) on the two connecting plates (32) are pressed against the steel sheet (2).

7. The PCBA board solder paste printing device according to any one of claims 2 to 6, characterized in that: The PCBA board (4) is fixedly arranged relative to the positioning slot (12) in any direction in the plane where the PCBA board (4) is located, and the PCBA board (4) is movably arranged relative to the positioning slot (12) in the first direction.

8. The PCBA board solder paste printing equipment according to claim 7, characterized in that: The first positioning portion comprises a positioning plate (7) disposed in the positioning groove (12), the outer periphery of the positioning plate (7) abutting against the inner wall of the positioning groove (12), and the positioning plate (7) being movably arranged in the first direction relative to the positioning groove (12); A first positioning frame (71) extending along the first direction is provided on the top surface of the positioning plate (7), the first positioning frame (71) enclosing a receiving space having a notch (73) on one side and used to receive the PCBA board (4), the PCBA board (4) enters and exits the first positioning frame (71) through the notch (73), and the outer periphery of the PCBA board (4) abuts against the first positioning frame (71); The positioning plate (7) has a baffle (72) on one side of the notch (73), and the baffle (72) is movably arranged along the first direction. The baffle (72) has at least two positions. In the first position, the baffle (72) is higher than the top surface of the positioning plate (7), and the baffle (72) abuts against the side of the PCBA board (4) to cooperate with the second positioning frame (111) to position the PCBA board (4); in the second position, the baffle (72) is lower than the top surface of the positioning plate (7), and the baffle (72) is disengaged from the abutment with the side of the PCBA board (4), so that the PCBA board (4) can be separated from the positioning plate (7).

9. The PCBA board solder paste printing equipment according to claim 8, characterized in that: The baffle (72) comprises a positioning section (721) extending along the first direction and a connecting section (722) perpendicular to the positioning section (721); The positioning plate (7) is provided with a through hole corresponding to the positioning section (721), and the positioning section (721) is used to abut or disengage with the side of the PCBA board (4); The connecting section (722) is located at the lower side of the positioning plate (7), and the connecting section (722) is connected to the positioning plate (7) via a first spring (76). The first spring (76) is used to provide elastic force for the baffle (72) to move toward the first position.

10. The PCBA board solder paste printing device according to claim 8, characterized in that: It also includes a base plate (5), the jig plate (1) and the positioning plate (7) are arranged on the base plate (5), a preset distance is provided between the jig plate (1) and the base plate (5), and the positioning plate (7) is movably arranged between the jig plate (1) and the base plate (5); A plurality of first vertical plates (81) are provided on the bottom plate (5), a first rotating shaft (82) is provided between two of the first vertical plates (81), and a coaxial first driving wheel (83) and a second driving wheel (84) are fixedly provided on the first rotating shaft (82); The baffle (72) is provided with a first drive plate (723) located on the lower side of the positioning plate (7), and the bottom surface of the positioning plate (7) is provided with a second drive plate (77), and the first drive plate (723) and the second drive plate (77) both extend along the first direction; The second drive plate (77) is in transmission connection with the second drive wheel (84), the first drive plate (723) is in transmission connection with the first drive wheel (83), the movement directions of the first drive plate (723) and the second drive plate (77) are consistent, and the speed of the first drive plate (723) is greater than the speed of the second drive plate (77).

11. The PCBA board solder paste printing device according to claim 10, characterized in that: The first driving wheel (83) and the second driving wheel (84) are rubber wheels, and the side of the first driving plate (723) in contact with the first driving wheel (83) and the side of the second driving wheel (84) in contact with the second driving plate (77) are both provided with a silicone surface to achieve transmission connection by utilizing friction force; The outer diameter of the first driving wheel (83) is greater than the outer diameter of the second driving wheel (84), so that the linear velocity at the tangent point between the first driving wheel (83) and the first driving plate (723) is greater than the linear velocity at the tangent point between the second driving wheel (84) and the second driving plate (77), the baffle (72) and the positioning plate (7) are relatively displaced in the first direction, and within the movable range of the positioning plate (7), the baffle (72) can move to the first position and the second position.

12. The PCBA board solder paste printing device according to claim 10, characterized in that: It also includes a first driving member (74) provided on the base plate (5), the first driving member (74) is distributed on both sides of the positioning plate (7) and is located on the lower side of the fixture plate (1), the power end of the first driving member (74) moves along the first direction, and the power end of the first driving member (74) is connected to the positioning plate (7).

13. The PCBA board solder paste printing device according to claim 10, characterized in that: A plurality of second vertical plates (91) are provided on the bottom plate (5), the first vertical plates (81) are located on the side of the positioning plate (7) having the notch (73), and the second vertical plates (91) are located on the side of the positioning plate (7) opposite to the notch (73); A second rotating shaft (92) and a third rotating shaft (93) are provided between the two second vertical plates (91); a fourth driving wheel (94) and a fifth driving wheel (95) are fixedly provided on the second rotating shaft (92); a sixth driving wheel (96) is provided on the third rotating shaft (93); one side of the sixth driving wheel (96) is connected to the fifth driving wheel (95) by transmission, and the other side is connected to the third driving plate (97); a push rod (98) is provided on the third driving plate (97); the push rod (98) passes through the first positioning frame (71) to push the PCBA board (4) toward the notch (73); A third drive wheel (85) is also provided on the first rotating shaft (82), and the third drive wheel (85) is connected to the fourth drive wheel (94) via a synchronous belt (86).

14. The PCBA board solder paste printing device according to claim 13, characterized in that: When the positioning plate (7) descends, the baffle (72) switches from the first position to the second position, the push rod (98) moves toward the notch (73), and when the baffle (72) is located at the second position, the push rod (98) contacts the side of the PCBA board (4), and as the positioning plate (7) continues to descend, the push rod (98) pushes the PCBA board (4) out of the first positioning frame (71).

15. The PCBA board solder paste printing device according to claim 13, characterized in that: There are two third drive plates (97), a T-shaped plate (102) fixed on the base plate (5) is provided between the two third drive plates (97), a fixed plate (101) fixed on the base plate (5) is provided on the opposite sides of the two third drive plates (97), the fixed plate (101) and the T-shaped plate (102) are provided with a guide groove (103), a guide block is provided on the third drive plate (97) and matches the guide groove (103), and the guide direction of the guide groove (103) is arranged along the axial direction of the push rod (98).

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